Same chapter3 marksDifficulty: Medium
A bag contains 5 red, 3 white and 2 black balls. One ball is drawn at random. Find the probability that it is red, and the probability that it is not black.
Probability
4 marksDifficulty: Hard
Three coins are tossed together. Find the probability of getting at least two heads.
Original Khojo Papers practice question — not from a past board paper.
Answer
1/2
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The sample space has 8 outcomes. At least two heads occurs in HHH, HHT, HTH and THH, which is 4 outcomes, so the probability is 4/8 = 1/2.
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